Add initial version with tests

PHP-Polyfills · Jan 10, 2024 · 1069cfb · 1069cfb
1 parent 3a09008
commit 1069cfb
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Showing 3 changed files with 177 additions and 3 deletions.
diff --git a/composer.json b/composer.json
@@ -14,9 +14,9 @@
     },
     "license": "MIT",
     "autoload": {
-        "psr-4": {
-            "Phpwatch\\MbTrimPolyfill\\": "src/"
-        }
+        "files": [
+            "src/mb_trim.php"
+        ]
     },
     "authors": [
         {

diff --git a/src/mb_trim.php b/src/mb_trim.php
@@ -0,0 +1,99 @@
+<?php
+
+function mb_trim(string $string, string $characters = " \f\n\r\t\v\x00\u{00A0}\u{1680}\u{2000}\u{2001}\u{2002}\u{2003}\u{2004}\u{2005}\u{2006}\u{2007}\u{2008}\u{2009}\u{200A}\u{2028}\u{2029}\u{202F}\u{205F}\u{3000}\u{0085}\u{180E}", ?string $encoding = null): string {
+    try {
+        @mb_check_encoding('', $encoding);
+    } catch (ValueError $e) {
+        throw new ValueError(sprintf('%s(): Argument #3 ($encoding) must be a valid encoding, "%s" given', __FUNCTION__, $encoding));
+    }
+
+    if ($characters === "") {
+        return $string;
+    }
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $string = mb_convert_encoding($string, "UTF-8", $encoding);
+        $characters = mb_convert_encoding($characters, "UTF-8", $encoding);
+    }
+
+    $charMap = array_map(static function(string $char) {
+        return preg_quote($char, '/');
+    }, mb_str_split($characters));
+
+    $regexClass = implode('', $charMap);
+
+    $regex = "/^[" . $regexClass . "]+|[" . $regexClass . "]+$/u";
+
+    $return = preg_replace($regex, '', $string);
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $return = mb_convert_encoding($return, $encoding, "UTF-8");
+    }
+
+    return $return;
+}
+
+function mb_ltrim(string $string, string $characters = " \f\n\r\t\v\x00\u{00A0}\u{1680}\u{2000}\u{2001}\u{2002}\u{2003}\u{2004}\u{2005}\u{2006}\u{2007}\u{2008}\u{2009}\u{200A}\u{2028}\u{2029}\u{202F}\u{205F}\u{3000}\u{0085}\u{180E}", ?string $encoding = null): string {
+    if ($characters === "") {
+        return $string;
+    }
+    try {
+        @mb_check_encoding('', $encoding);
+    } catch (ValueError $e) {
+        throw new ValueError(sprintf('%s(): Argument #3 ($encoding) must be a valid encoding, "%s" given', __FUNCTION__, $encoding));
+    }
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $string = mb_convert_encoding($string, "UTF-8", $encoding);
+        $characters = mb_convert_encoding($characters, "UTF-8", $encoding);
+    }
+
+    $charMap = array_map(static function(string $char) {
+        return preg_quote($char, '/');
+    }, mb_str_split($characters));
+
+    $regexClass = implode('', $charMap);
+
+    $regex = "/^[" . $regexClass . "]+/u";
+
+    $return = preg_replace($regex, '', $string);
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $return = mb_convert_encoding($return, $encoding, "UTF-8");
+    }
+
+    return $return;
+}
+
+function mb_rtrim(string $string, string $characters = " \f\n\r\t\v\x00\u{00A0}\u{1680}\u{2000}\u{2001}\u{2002}\u{2003}\u{2004}\u{2005}\u{2006}\u{2007}\u{2008}\u{2009}\u{200A}\u{2028}\u{2029}\u{202F}\u{205F}\u{3000}\u{0085}\u{180E}", ?string $encoding = null): string {
+    if ($characters === "") {
+        return $string;
+    }
+    try {
+        @mb_check_encoding('', $encoding);
+    } catch (ValueError $e) {
+        throw new ValueError(sprintf('%s(): Argument #3 ($encoding) must be a valid encoding, "%s" given', __FUNCTION__, $encoding));
+    }
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $string = mb_convert_encoding($string, "UTF-8", $encoding);
+        $characters = mb_convert_encoding($characters, "UTF-8", $encoding);
+    }
+
+    $charMap = array_map(static function(string $char) {
+        return preg_quote($char, '/');
+    }, mb_str_split($characters));
+
+    $regexClass = implode('', $charMap);
+
+    $regex = "/[" . $regexClass . "]+$/u";
+
+    $return = preg_replace($regex, '', $string);
+
+    if ($encoding !== null && $encoding !== 'UTF-8') {
+        $return = mb_convert_encoding($return, $encoding, "UTF-8");
+    }
+
+    return $return;
+}
+
diff --git a/tests/MbTrimTest.php b/tests/MbTrimTest.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace PHPWatch\MbTrimPolyfill\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+use function mb_ltrim;
+use function mb_rtrim;
+use function mb_trim;
+
+class MbTrimTest extends TestCase {
+
+    public function testMbTrim(): void {
+        $this->assertSame("ABC", mb_trim("ABC"));
+        $this->assertSame("ABC", mb_ltrim("ABC"));
+        $this->assertSame("ABC", mb_rtrim("ABC"));
+
+        $this->assertSame('ABC', mb_trim(" \0\t\nABC \0\t\n"));
+        $this->assertSame("ABC \0\t\n", mb_ltrim(" \0\t\nABC \0\t\n"));
+        $this->assertSame(" \0\t\nABC", mb_rtrim(" \0\t\nABC \0\t\n"));
+        $this->assertSame(" \0\t\nABC \0\t\n", mb_rtrim(" \0\t\nABC \0\t\n",''));
+
+        $this->assertSame("", mb_trim(""));
+        $this->assertSame("", mb_ltrim(""));
+        $this->assertSame("", mb_rtrim(""));
+
+        $this->assertSame(" test ", mb_ltrim(' test ', ''));
+        $this->assertSame("あいうえおあお", mb_trim("　あいうえおあお　", "　", "UTF-8"));
+        $this->assertSame("foo BAR Spa", mb_trim('foo BAR Spaß', 'ß', "UTF-8"));
+        $this->assertSame("oo BAR Spaß", mb_trim('foo BAR Spaß', 'f', "UTF-8"));
+
+        $this->assertSame("oo BAR Spa", mb_trim('foo BAR Spaß', 'ßf', "UTF-8"));
+        $this->assertSame("oo BAR Spa", mb_trim('foo BAR Spaß', 'fß', "UTF-8"));
+        $this->assertSame("いうおえお ", mb_trim("　あいうおえお 　あ", "　あ", "UTF-8"));
+        $this->assertSame("いうおえお ", mb_trim("　あいうおえお 　あ", "あ　", "UTF-8"));
+        $this->assertSame("　あいうおえお 　", mb_trim("　あいうおえお 　a", "あa", "UTF-8"));
+        //$this->assertSame("　あいうおえお 　a", mb_trim("　あいうおえお 　a", "\xe3", "UTF-8"));
+
+        $this->assertSame("", mb_trim(str_repeat("　", 129)));
+        $this->assertSame("a", mb_trim(str_repeat("　", 129) . "a"));
+        $this->assertSame("　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　a", mb_rtrim(str_repeat("　", 129) . "a"));
+
+        $trim_chars = "";
+        for ($i = 1024; $i < 2048; $i++) {
+            $trim_chars .= mb_chr($i);
+        }
+        $this->assertSame("hello", mb_trim($trim_chars . "hello" . $trim_chars, $trim_chars));
+        $this->assertSame(2053, strlen(mb_ltrim($trim_chars . "hello" . $trim_chars, $trim_chars)));
+        $this->assertSame(2053, strlen(mb_ltrim($trim_chars . "hello" . $trim_chars, $trim_chars)));
+
+        $this->assertSame("いああああ", mb_ltrim("あああああああああああああああああああああああああああああああああいああああ", "あ"));
+
+        $this->assertSame("あああああああああああああああああああああああああああああああああい", mb_rtrim("あああああああああああああああああああああああああああああああああいああああ", "あ"));
+
+        $this->assertSame("", mb_trim(" \f\n\r\v\x00\u{00A0}\u{1680}\u{2000}\u{2001}\u{2002}\u{2003}\u{2004}\u{2005}\u{2006}\u{2007}\u{2008}\u{2009}\u{200A}\u{2028}\u{2029}\u{202F}\u{205F}\u{3000}\u{0085}\u{180E}"));
+
+        $this->assertSame("", mb_trim(" \f\n\r\v\x00\u{00A0}\u{1680}\u{2000}\u{2001}\u{2002}\u{2003}\u{2004}\u{2005}\u{2006}\u{2007}\u{2008}\u{2009}\u{200A}\u{2028}\u{2029}\u{202F}\u{205F}\u{3000}\u{0085}\u{180E}"));
+
+        $this->assertSame("漢字", mb_ltrim("\u{FFFE}漢字", "\u{FFFE}\u{FEFF}"));
+        $this->assertSame("226f575b", bin2hex(mb_ltrim(mb_convert_encoding("\u{FFFE}漢字", "UTF-16LE", "UTF-8"), mb_convert_encoding("\u{FFFE}\u{FEFF}", "UTF-16LE", "UTF-8"), "UTF-16LE")));
+        $this->assertSame("6f225b57", bin2hex(mb_ltrim(mb_convert_encoding("\u{FEFF}漢字", "UTF-16BE", "UTF-8"), mb_convert_encoding("\u{FFFE}\u{FEFF}", "UTF-16BE", "UTF-8"), "UTF-16BE")));
+
+        $this->assertSame(" abcd ", mb_trim(" abcd ", ""));
+        $this->assertSame(" abcd ", mb_ltrim(" abcd ", ""));
+        $this->assertSame(" abcd ", mb_rtrim(" abcd ", ""));
+
+        $this->assertSame("あ", mb_convert_encoding(mb_trim("\x81\x40\x82\xa0\x81\x40", "\x81\x40", "SJIS"), "UTF-8", "SJIS"));
+
+        $this->assertSame("f", mb_trim("foo", "oo"));
+
+
+        $this->expectException(\ValueError::class);
+        mb_trim( "\u{180F}", "", "NULL");
+    }
+}